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Backofen, Rainer
amdis
Commits
bd488753
Commit
bd488753
authored
Feb 20, 2012
by
Thomas Witkowski
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Possibility to remove null space of rhs vectors in parallel computations.
parent
430cb57b
Changes
2
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2 changed files
with
14 additions
and
1 deletion
+14
-1
AMDiS/src/parallel/PetscSolverGlobalMatrix.cc
AMDiS/src/parallel/PetscSolverGlobalMatrix.cc
+7
-0
AMDiS/src/parallel/PetscSolverGlobalMatrix.h
AMDiS/src/parallel/PetscSolverGlobalMatrix.h
+7
-1
No files found.
AMDiS/src/parallel/PetscSolverGlobalMatrix.cc
View file @
bd488753
...
...
@@ -151,6 +151,13 @@ namespace AMDiS {
VecAssemblyBegin
(
petscRhsVec
);
VecAssemblyEnd
(
petscRhsVec
);
if
(
removeRhsNullSpace
)
{
MatNullSpace
sp
;
MatNullSpaceCreate
(
PETSC_COMM_WORLD
,
PETSC_TRUE
,
0
,
PETSC_NULL
,
&
sp
);
MatNullSpaceRemove
(
sp
,
petscRhsVec
,
PETSC_NULL
);
MatNullSpaceDestroy
(
&
sp
);
}
}
...
...
AMDiS/src/parallel/PetscSolverGlobalMatrix.h
View file @
bd488753
...
...
@@ -88,11 +88,14 @@ namespace AMDiS {
o_nnz
(
NULL
),
lastMeshNnz
(
0
),
zeroStartVector
(
false
),
alwaysCreateNnzStructure
(
false
)
alwaysCreateNnzStructure
(
false
),
removeRhsNullSpace
(
false
)
{
Parameters
::
get
(
"parallel->use zero start vector"
,
zeroStartVector
);
Parameters
::
get
(
"parallel->always create nnz structure"
,
alwaysCreateNnzStructure
);
Parameters
::
get
(
"parallel->remove rhs null space"
,
removeRhsNullSpace
);
}
void
fillPetscMatrix
(
Matrix
<
DOFMatrix
*>
*
mat
);
...
...
@@ -141,6 +144,9 @@ namespace AMDiS {
/// Mapping from global DOF indices to global matrix indices under
/// consideration of possibly multiple components.
DofToMatIndex
dofToMatIndex
;
/// If true, the constant null space is projected out of the RHS vector.
bool
removeRhsNullSpace
;
};
...
...
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